An estimated 3,800 investors lost millions of dollars in the real estate ventures.

Last year, a receiver was appointed to wind down Concrete's business.

On Wednesday, the Alberta Securities Commission was told two of the men charged don't have lawyers and a third, whose last known address is in Mexico, has not been located.

"We give them a chance to … attend themselves and legal counsel, or to make sure they have a chance to give their side of the story. They could phone in during the hearing itself [and] listen in," said Mark Dickey, spokesperson for the Alberta Securities Commission.

The hearing is scheduled to start Feb. 14 and is expected to last one month.